<script lang="ts" setup name="HomeCategory">
import useStore from '@/store'
// import XtxSkeleton from '@/components/skeleton/index.vue'
import { computed, ref } from 'vue'
const { category } = useStore()

// 准备一个数据 存储当前激活的分类id  将来就可以对应的取出他的goods 用于layer展示
const categoryId = ref('')

const goods = computed(() => {
  const temp = category.list.find((item) => item.id === categoryId.value) // 激活的分类对象
  // ?. 只能获取 不能设置
  return temp?.goods
})

const handleEnter = (id: string) => {
  // 判断如果没有id  不应该赋值
  if (!id) return
  categoryId.value = id
}
</script>
<template>
  <!-- 
    1.移入layer 希望保留高亮
    2.移出整个左侧分类区域 希望没有高亮
    3.数据没有回来之前, 移入分类 所有都高亮了 => 一开始没有id
  -->
  <div class="home-category" @mouseleave="categoryId = ''">
    <ul class="menu">
      <!-- 分类数据是有假数据的过程, 每一项一开始长这样 {name: 'xxx'}!!! -->
      <li
        v-for="(item, index) in category.list"
        :key="index"
        @mouseenter="handleEnter(item.id)"
        :class="{ active: categoryId === item.id }"
      >
        <!-- 一级 -->
        <RouterLink :to="item.id ? `/category/${item.id}` : '/'">
          {{ item.name }}
        </RouterLink>

        <template v-if="item.children">
          <!-- 二级分类的展示 -->
          <RouterLink
            :to="`/category/sub/${sub.id}`"
            v-for="sub in item.children.slice(0, 2)"
            :key="sub.id"
          >
            {{ sub.name }}
          </RouterLink>
        </template>

        <template v-else>
          <XtxSkeleton
            :width="60"
            :height="18"
            style="margin-right: 5px"
            bg="rgba(255,255,255,0.2)"
            animated
            fade
          ></XtxSkeleton>
          <XtxSkeleton
            :width="50"
            :height="18"
            bg="rgba(255,255,255,0.2)"
            animated
            fade
          ></XtxSkeleton>
          <!-- vscode对于全局组件不太友好, 不认识!! 没有类型提示 -->
          <!-- 那我就给你一个类型声明文件 -->
          <!-- <XtxSkeleton></XtxSkeleton> -->
        </template>
      </li>
    </ul>

    <!-- 所有的li共用一个弹层 -->
    <div class="layer" v-if="goods">
      <h4>分类推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <ul>
        <li v-for="item in goods" :key="item.id">
          <RouterLink to="/">
            <!-- <RouterLink :to="`/product/${item.id}`"> -->
            <img :src="item.picture" alt="" />
            <div class="info">
              <p class="name ellipsis-2">{{ item.name }}</p>
              <p class="desc ellipsis">{{ item.desc }}</p>
              <p class="price"><i>¥</i>{{ item.price }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<style scoped lang="less">
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;

  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
            width: 95px;
            height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: @priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }
  }

  &:hover {
    .layer {
      display: block;
    }
  }
  .menu {
    li {
      padding-left: 40px;
      height: 55px;
      line-height: 55px;
      &:hover,
      &.active {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
}
</style>
